Probably because that pod let up to an open environment filled with objects Sidious could use to his advantage, not because he wanted to be in a tight space with Yoda.
Sidious took a risk.
__________________ "There is only Revan. Only he can shape this galaxy as it is meant to be shaped."
They could have been equal on neutral ground but Sidious wanted to tip the favor to his side by bringing the Force into play by bringing them up to the Senate chamber.
(I disagree with the idea Sidious is a better swordsman than Yoda.)
__________________ "There is only Revan. Only he can shape this galaxy as it is meant to be shaped."
It's not like he could accomplish anything with them though, the lightning was the decisive factor in the fight. I don't think someone as smart as Sidious would logically think that the objects could actually be used in any meaningful way against Yoda. Even if Yoda wasn't strong enough to blast them about himself( which is just wrong) he could just as easily dodge and expend lesser energy.
Why or why not Palp decided to go to the pod isn't relevant.
Palps is repeatedly stated to be >= Yoda as a swordsmen, and it's explicitly stated that level nine fighters are close enough that enviromental surroundings can tip fights in an opponent's direction.
Either
A. Enviromental surroundings managed to tip the fight in Yoda's favor(supported by the quote Nova pulled regarding their fight)
B. Yoda, still being a virtual equal for the emperor, managed an upset.
They are angry because they have been forced to recognize that their hour has arrived; that the time has come to surrender power to Shimrra and the new order."
He never defeated Maul with Sabers... they exchanged blows with no clear winner, until Palpatine breaks the bladelock and uses his force abilities. Maul is a better duelist